package com.bc.commoncore.util;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Hashtable;

/**
 * 获取时间段
 * 使用方式：
 * 传入枚举DayType类型： thisMonth本月, lastMonth上月, lastThreeMonth最近三个月, 
 * hafeYear最近半年, thisYear今年, lastYear去年。
 * @author jibiao.liu
 * @date 2016.6.6
 */
public class TimeScope {

	// 用来全局控制 上一周，本周，下一周的周数变化
	private static int weeks = 0;
	private static int MaxDate;// 一月最大天数
	private static int MaxYear;// 一年最大天数

	public static Hashtable<String, String> getDateToDate(DayType dayType) {
		Hashtable<String, String> ht = new Hashtable<String, String>();
		String start = "";
		String end = "";

		switch (dayType) {
		case thisMonth:// 本月
			start = getThisMonthStart();
			end = getThisMonthEnd();
			break;

		case lastMonth:// 上月
			start = getLastMonthStart();
			end = getLastMonthEnd();
			break;
		case lastThreeMonth:// 最近三个月（包含本月）
			start = getLastThreeMonthStart(-2);
			end = getThisMonthEnd();// 最近三个月的最后一天即是本月的最后一天
			break;
		case hafeYear:// 最近半年
			start = getLastThreeMonthStart(-5);
			end = getThisMonthEnd();
			break;
		case thisYear:// 今年
			start = getThisYearStart();
			end = getThisYearEnd();
			break;
		case lastYear:// 去年
			start = getLastYearFirst();
			end = getLastYearEnd();
			break;
		default:
			start = getThisMonthStart();
			end = getThisMonthEnd();
			break;
		}

		ht.put("start", start);
		ht.put("end", end);
		return ht;
	}

	// 获取当月第一天
	private static String getThisMonthStart() {
		String str = "";
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

		Calendar lastDate = Calendar.getInstance();
		lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
		str = sdf.format(lastDate.getTime());
		return str;
	}

	// 计算当月最后一天
	private static String getThisMonthEnd() {
		String str = "";
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

		Calendar lastDate = Calendar.getInstance();
		lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
		lastDate.add(Calendar.MONTH, 1);// 加一个月，变为下月的1号
		lastDate.add(Calendar.DATE, -1);// 减去一天，变为当月最后一天
		str = sdf.format(lastDate.getTime());
		return str;
	}

	// 上月第一天
	private static String getLastMonthStart() {
		String str = "";
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

		Calendar lastDate = Calendar.getInstance();
		lastDate.set(Calendar.DATE, 1);// 设为当前月的1号
		lastDate.add(Calendar.MONTH, -1);// 减一个月，变为下月的1号
		// lastDate.add(Calendar.DATE,-1);//减去一天，变为当月最后一天

		str = sdf.format(lastDate.getTime());
		return str;
	}

	// 上月最后一天
	private static String getLastMonthEnd() {
		String str = "";
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

		Calendar lastDate = Calendar.getInstance();
		lastDate.add(Calendar.MONTH, -1);// 减一个月
		lastDate.set(Calendar.DATE, 1);// 把日期设置为当月第一天
		lastDate.roll(Calendar.DATE, -1);// 日期回滚一天，也就是本月最后一天
		str = sdf.format(lastDate.getTime());
		return str;
	}

	// 最近三个月第一天
	private static String getLastThreeMonthStart(int monthCount) {
		Calendar calendar = new GregorianCalendar();
		calendar.add(Calendar.MONTH, monthCount);
		calendar.set(Calendar.DAY_OF_MONTH, 1);
		String str = DateFormat.getDateInstance(DateFormat.MEDIUM).format(
				(Date) calendar.getTime().clone());
		return str;
	}

	// 获得本年第一天
	private static String getThisYearStart() {
		int yearPlus = getYearPlus();
		GregorianCalendar currentDate = new GregorianCalendar();
		currentDate.add(GregorianCalendar.DATE, yearPlus);
		Date yearDay = currentDate.getTime();
		DateFormat df = DateFormat.getDateInstance();
		String preYearDay = df.format(yearDay);
		return preYearDay;
	}

	private static int getYearPlus() {
		Calendar cd = Calendar.getInstance();
		int yearOfNumber = cd.get(Calendar.DAY_OF_YEAR);// 获得当天是一年中的第几天
		cd.set(Calendar.DAY_OF_YEAR, 1);// 把日期设为当年第一天
		cd.roll(Calendar.DAY_OF_YEAR, -1);// 把日期回滚一天。
		int MaxYear = cd.get(Calendar.DAY_OF_YEAR);
		if (yearOfNumber == 1) {
			return -MaxYear;
		} else {
			return 1 - yearOfNumber;
		}
	}

	// 获得本年最后一天
	private static String getThisYearEnd() {
		Date date = new Date();
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
		String years = dateFormat.format(date);
		return years + "-12-31";
	}

	// 获得去年第一天
	public static String getLastYearFirst() {
		Date date = new Date();
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
		String years = dateFormat.format(date);
		int years_value = Integer.parseInt(years);
		years_value--;
		return years_value + "-1-1";
	}

	// 获得去年最后一天
	private static String getLastYearEnd() {
		weeks--;
		int yearPlus = getYearPlus();
		GregorianCalendar currentDate = new GregorianCalendar();
		currentDate.add(GregorianCalendar.DATE, yearPlus + MaxYear * weeks
				+ (MaxYear - 1));
		Date yearDay = currentDate.getTime();
		DateFormat df = DateFormat.getDateInstance();
		String preYearDay = df.format(yearDay);
		getThisSeasonTime(11);
		return preYearDay;
	}

	// 获得本季度
	private static String getThisSeasonTime(int month) {
		int array[][] = { { 1, 2, 3 }, { 4, 5, 6 }, { 7, 8, 9 }, { 10, 11, 12 } };
		int season = 1;
		if (month >= 1 && month <= 3) {
			season = 1;
		}
		if (month >= 4 && month <= 6) {
			season = 2;
		}
		if (month >= 7 && month <= 9) {
			season = 3;
		}
		if (month >= 10 && month <= 12) {
			season = 4;
		}
		int start_month = array[season - 1][0];
		int end_month = array[season - 1][2];

		Date date = new Date();
		SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");// 可以方便地修改日期格式
		String years = dateFormat.format(date);
		int years_value = Integer.parseInt(years);

		int start_days = 1;// years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);
		int end_days = getLastDayOfMonth(years_value, end_month);
		String seasonDate = years_value + "-" + start_month + "-" + start_days
				+ ";" + years_value + "-" + end_month + "-" + end_days;
		return seasonDate;

	}

	/**
	 * 获取某年某月的最后一天
	 * 
	 * @param year
	 *            年
	 * @param month
	 *            月
	 * @return 最后一天
	 */
	private static int getLastDayOfMonth(int year, int month) {
		if (month == 1 || month == 3 || month == 5 || month == 7 || month == 8
				|| month == 10 || month == 12) {
			return 31;
		}
		if (month == 4 || month == 6 || month == 9 || month == 11) {
			return 30;
		}
		if (month == 2) {
			if (isLeapYear(year)) {
				return 29;
			} else {
				return 28;
			}
		}
		return 0;
	}

	/**
	 * 是否闰年
	 * 
	 * @param year
	 *            年
	 * @return
	 */
	private static boolean isLeapYear(int year) {
		return (year % 4 == 0 && year % 100 != 0) || (year % 400 == 0);
	}
	
	public static void main1(String[] args) {  
        DayType dayType = DayType.thisMonth;  
        Hashtable<String, String> ht = TimeScope.getDateToDate(dayType);  
        System.out.println(ht.get("start"));  
        System.out.println(ht.get("end"));  
    }
	
	public static void main(String[] args) {  
        Calendar now = Calendar.getInstance();  
        System.out.println("年: " + now.get(Calendar.YEAR));  
        System.out.println("月: " + (now.get(Calendar.MONTH) + 1) + "");  
        System.out.println("日: " + now.get(Calendar.DAY_OF_MONTH));  
        System.out.println("时: " + now.get(Calendar.HOUR_OF_DAY));  
        System.out.println("分: " + now.get(Calendar.MINUTE));  
        System.out.println("秒: " + now.get(Calendar.SECOND));  
        System.out.println("当前时间毫秒数：" + now.getTimeInMillis());  
        System.out.println(now.getTime());  
  
        Date d = new Date();  
        System.out.println(d);
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");  
        String dateNowStr = sdf.format(d);  
        System.out.println("格式化后的日期：" + dateNowStr);  
          
        /*String str = "2012-1-13 17:26:33";  //要跟上面sdf定义的格式一样  
        Date today = sdf.parse(str);  
        System.out.println("字符串转成日期：" + today);*/ 
        
        System.out.println("-->"+sdf.format(new Date()));
        
        
    }
	
	private static String getDate() {
		Calendar now = Calendar.getInstance();  
		String year = String.valueOf(now.get(Calendar.YEAR));
		String month = String.valueOf(now.get(Calendar.MONTH) + 1);
		String day = String.valueOf(now.get(Calendar.DAY_OF_MONTH));
		String date = year+"-"+month+"-"+day;
		return date;
	}
	
	
}

